#include <stdio.h>
#include <string.h> //提供strncpy()的函数原型

#define SIZE 40
#define TARGSIZE 7
#define LIM 5

char *s_gets(char *st, int n);

int main() {
    char qwords[LIM][TARGSIZE];
    char temp[SIZE];
    int i = 0;
    printf("Enter %d words beginning with q:\n", LIM);
    while (i < LIM && s_gets(temp, SIZE)) {
        if (temp[0] != 'q')
            printf("%s doesn't begin with q!\n",temp);
        else
        {
            strncpy(qwords[i],temp,TARGSIZE - 1);
            qwords[i][TARGSIZE - 1]= '\0';
            i++;
        }
    }
    puts("Here are the words accepted:");
    for ( i = 0; i < LIM; i++) {
        puts(qwords[i]);
    }
    return 0;
}
char * s_gets(char * st,int n){
    char * ret_val;
    int i = 0;

    ret_val = fgets(st,n,stdin);
    if(ret_val){
        while (st[i] != '\n' && st[i] !='\0')
            i++;
        if(st[i] == '\n')
            st[i]='\0';
        else
            while (getchar() != '\n')
                continue;
    }
    return ret_val;
}
